Presser foot attachment for sewing machines



A. MASLER May 28, 1940.v

PRESSER FOOT ATTACHMENT FOR SEWING MACHINES 7 Filed Dec. 10, 1957 INVENTOR.

- ATTORNEY.

Patented May 28, 1940 UNITED STATES PATENT OFFICE PRESSER FOOT ATTACHMENT FOR SEWING MACHINES 2 Claims.

The improvements relate to sewing machines and more particularly to what is commonly known as the presser foot of such machines, which operates to hold and assist in passing the cloth beneath the reciprocating needle while being stitched.

It is a primary object of the improvements to provide a sewing machine foot to which may be attached a series of gauge and guide feet or half feet, which may be inserted in a minimum of time, and when inserted will be accurately positioned, will not require any adjustment on the part of the operator in order to obtain the correct spacing and will act to gauge the stitching line and guide and hold the material.

Heretofore there has been marked difficulty in the use of detachable measuring feet, as they require frequent adjustment on the part of the operator, when in operation, catch in the cloth being worked on or obstruct its movement, and are likely by reason of such catching or obstruction and the resultant bunohing of the cloth to throw the cloth ofi the line or twist or wrinkle it, thereby making a crooked and otherwise unsatisfactory stitch. This is particularly true when heavy material is being operated upon.

More particularly it is my object to provide a half presser foot with auxiliary half feet or gauge and guide feet for different measurements which will serve not only to gauge the stitch but will hold the cloth in position and guide and control it while being stitched.

My invention further provides various and useful features of construction which will appear and be more fully described in the following specification and pointed out in the appended claims.

Fig. 1 is a side elevation of a half presser foot with a vertical section of an auxiliary gauge and guide in place embodying the improvements;

Fig. 2 is a front view of the same with an auxiliary foot gauge in place;

Fig. 3 is a perspective side view of an auxiliary foot in position on a half presser foot;

Fig. 4 is a side'view of a complete presser foot composed of the half foot and an auxiliary half foot positioned in the same manner as the gauge feet;

Fig. 5 is a perspective view of one of the auxiliary foot gauges of lesser width;

Fig. 6 is a vertical medial section of the foot and auxiliary gauge and guide foot at work on heavy cloth.

Referring to the accompanying drawing, the spring clamp I is forced upwardly and outwardly from the permanent presser bar member 2 by pressing the lever 3 which is pivoted at a point 4. The spring clamp l carries with it the spring foot 5 which by the motion of the spring clamp is raised from the permanent half foot 6 allowing the tongue 1 to be inserted in the space between these members when the lever 3 is pressed.

In Figs. 2 and 3 are shown two views of an inserted guide and measuring foot. The flat part 8 is in plane with the tongue member 1 substantially and tapers upward at ill to form the ski or sled-runner-like part 9 at its forward end. The width of the parts 8, 9 and Ill is dependent upon the measuring size of the guiding half foot required. The half foot in Fig. 5 shows the parts 8, 9 and Ill all to be of lesser width which indicates a smaller spacing of the stitch line from the edge of the goods. The parts 8, 9 and II] are bent over at the end and shaped to form a runner flange ll rounded off at both extremities as at [2 and I3 and having a straight bottom edge so that the runner will not catch in the cloth over which it travels and will compress the same evenly between itself and the table I9. It will be noted that between the permanent foot 6 and the runner H there is thus formed a channel 14 through which the cloth being worked on may pass freely in a straight line while at the same time it is smoothed out and held against lateral movement.

Figure 4 shows the half foot with a regular complemental half foot l5 attached. This foot is made with an attachment tongue the same as the measuring feet and is inserted in the same manner. In all views I6 is the needle hole or channel.

Figure 6 shows the improvements in use. Two pieces of cloth I! and I8 are being sewed together and they rest on the table l9. In the operation shown a lapped seam or a selvage is being stitched, and in the same manner a folded flap or plait may be sewn to another piece. It will be seen that the main half-foot 6 presses down on the plys of cloth I l and I8 and holds them firmly so that the needle working through the hole l5 may operate easily and eificiently, while the parts 8, 9 and Ill glide over the surface of the cloth, smoothing and guiding it and do not compress it to an extent sufficient to retard it; yet the runner ll glides along the edge of the cloth thereby forming a positive measuring means and guide for the forming of a straight sewing operation. Various other uses and advantages will be apparent to those skilled in the art.

It has been found that the present invention is a great improvement over all previous forms of presser feet for the peculiar form of the parts 8, 9, H] and H, prevents any catching and wrinkling of the cloth and in fact causes them to be flattened and held smooth as they pass the needle while the rise which is indicated at 9 and I 8 allows the foot to glide smoothly over the cloth. The measuring and guilding half feet are made in different sizes--usually one-fourth to one inch in width-and may be easily and quickly inserted, removed and replaced, the overlap 20 of the part 8, serving as a stop so that the tongue 1 may be inserted only so far and no further. This is much easier than shifting a bar with a graduated scale and clamping it at the exact point desired, and also permits the use of a cloth guiding and smoothing member between the edge gauge and the needle which eliminates bunching and other trouble and insures better and faster work.

What I claim is:

1. In a device of the character indicated a presser foot having a needle hole therein, a substantially horizontal plate, means for securing the same to the presser foot approximately in plane therewith and extending laterally therefrom and forwardly beyond the needle hole said plate having at its side edge opposite said presscr foot a downwardly extending guide flange substantially parallel with said foot, the lower edge of which is approximately in plane with the bottom of the foot, there being a space between said guide and foot for the passage of cloth beneath said plate, said securing means comprising an upwardly extending integral post at the rear of the presser foot adapted to be fixed to and from substantially a part of the presser bar, a leaf spring secured to said post above the foot extending downwardly therefrom and having a horizontally turned lower end spaced above the foot, a lever mounted on said post having its work end bearing against said spring to force it outwardly, and an extension of the plate insertable beneath the turned lower end of said spring when the same is raised by the lever.

2. In a device of the character indicated a presser foot having a needle hole therein, a substantially horizontal plate, means for securing the same to the presser foot approximately in plane therewith and extending laterally therefrom and forwardly beyond the needle hole, said securing means comprising an upwardly extending integral post at the rear of the presser foot adapted to be fixed to and form substantially a part of the presser bar, a spring member secured to said post above the foot extending downwardly therefrom and having a horizontally turned lower end spaced above the foot, a lever mounted on said post having its work end bearing against said spring to force it out wardly, and an extension of the plate insertablc beneath the turned lower end of said spring when the same is raised by the lever.

ABRAHAM MASLER. 

